Which of the following nuclei undergo fission when struck

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Which of the following nuclei undergo fission when struck by thermal neutrons ?
1. U²³⁵
2. U²³⁸
3. Pu²³⁹
Select the correct answer using the codes given below

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Correct Option: C

NA